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Design >> RF Design >> homodyne or heterodyne receiver in modern wireless communication system?
https://designers-guide.org/forum/YaBB.pl?num=1429795593

Message started by Jacki on Apr 23^rd, 2015, 6:26am

Title: homodyne or heterodyne receiver in modern wireless communication system?
Post by Jacki on Apr 23^rd, 2015, 6:26am

Hi,

I am reading the book RF microelectronics, and comparing the homodyne and heterodyne receivers. Both of them have the advantages and disadvantages. Because the homodyne can achieve the monolithic integration and avoid the 50 Ohm match between the internal blocks in the RF front-end, personally I think homodyne could be more popular in modern wireless communication system.
Are homodyne receivers dominating the modern wireless communication systems? If so, does it mean the DC offset and the I/Q mismatch could be reduce in the digital signal processing, and they are not serious problems now?
I try to find some articles which can compare the heterodyne and homodyne while list the application in the modern wireless communication systems, but I could not find the papers to describe that.
Could anybody give me some further information beyond the book?
Thank you.
Regards,
Jacki

Title: Re: homodyne or heterodyne receiver in modern wireless communication system?
Post by loose-electron on May 8^th, 2015, 4:24pm

Direct Down Conversion - is the more commonly used name for homodyne receiver conversion. It is being more widely adopted for integrated receivers these days.

Heterodyne, or "Super Heterodyne" receivers, involve more than one mixer and resulting frequency conversion.
More common in older designs.

Frequency planning, out of band issues and linearity are easier to do in a Heterodyne receiver, but a direct down conversion receiver generally uses less power.